Cometic Hi-Performance Top End Gasket Kit for 4-Stroke Engines
Cometic Hi-Performance Top End Gasket Kit for 4-Stroke Engines
About this product
About this product
Ensure peak engine performance and reliability for your 4-stroke motorcycle with the Cometic Hi-Performance Top End Gasket Kit. Engineered for demanding conditions, this comprehensive kit provides superior sealing and durability for your engine's crucial top-end components, from base to head.
Description
The Cometic Hi-Performance Top End Gasket Kit is meticulously designed to meet the rigorous demands of today's highest-output 4-stroke naturally aspirated and boosted machines. At its core are the advanced Multi-Layer Steel (MLS) head gaskets, which are critical for promoting an even torque load across the gasket sealing surface. This innovative design significantly reduces bore distortion, leading to a better piston ring seal and, ultimately, more power for your ride. Crafted from a multi-layered steel design, the outer layers are embossed and coated with a durable Viton rubber, ensuring exceptional performance under high-horsepower and high-cylinder-pressure conditions. The kit also features Cometic's Extreme Sealing Technology (EST), incorporating embossed stainless steel head, base, and rocker gaskets, all covered with a proprietary rubber material for an impenetrable seal. This specialized head gasket material efficiently draws heat away from the combustion ring, dissipating it evenly across the gasket surface to eliminate hot spots and prevent premature gasket failure. With a precise bore size of 97.00 mm (3.818") and a thickness of 0.71 mm (0.028"), this MLX (Multi-Layer-Xtreme) kit is a testament to quality, proudly Made in the USA.
Features & Highlights
- Comprehensive Top End Sealing: Includes all necessary base, head gaskets, cylinder O-rings, and other top-end specific seals for a complete and reliable engine rebuild.
- Advanced MLS Head Gaskets: Utilizes Multi-Layer Steel technology to ensure even torque distribution, minimize bore distortion, enhance piston ring seal, and unlock more power.
- Extreme Sealing Technology (EST): Features embossed stainless steel gaskets coated with a proprietary rubber material for superior durability and an unyielding seal under extreme conditions.
- Viton Rubber Coating: Outer layers are embossed and coated with Viton rubber, specifically engineered to withstand the high temperatures and pressures of modern high-output 4-stroke engines.
- Optimized Heat Dissipation: Unique gasket material effectively draws heat away from the combustion ring, preventing hot spots and extending gasket life.
- Precision Engineered for 4-Stroke Engines: Designed for exact fitment and performance in high-horsepower 4-stroke applications, both naturally aspirated and boosted.
- Proudly Made in the USA: Manufactured with exceptional quality and craftsmanship, ensuring reliability you can trust.
Technical Specifications
- Type: Top End
- Model: Hi-Performance
- Units: Kit
- Material: MLX (Multi-Layer-Xtreme)
- Bore Size: 97.00 mm (3.818")
- Thickness: 0.71 mm (0.028")
- Engine Type: 4-Stroke
- Vendor Part Number: C3813
Shipping & Return
Shipping & Return
Free shipping to GLS parcel shop parcel box for purchases over DKK 1,000.
GLS home delivery costs DKK 59.
We do our best to ship your order as quickly as possible. All orders are generally packed within 24 hours on weekdays.
There is a 14-day return policy. Read more
Specifications
C3813
Hi-Performance
Gasket Kit
97,00 mm (3,818")
154 mm
13 mm
0,71 mm (0,028")
175 mm
4-Stroke
MLX (Multi-Layer-Xtreme)
Top End
Kit
Reviews


Who is behind Parts Denmark
Martin and William are the duo behind Parts Denmark — an unlikely but awesome combo of a tech-savvy young IT wizard and a seasoned motorcycle guru who’s seen (and fixed) it all. Together, we’ve built a team with big ambitions, plenty of passion, and a shared mission to create great things — side-by-side with you.
Based in Denmark
Fast customer support
Over 100.000 Products
2-Year Full Warranty
Your peace of mind is our priority. Every product in our shop comes with a comprehensive 2-year warranty, so you can hit the road with full confidence.
Support in Danish, Swedish, German & English
Whether you are upgrading your exhaust or choosing a new helmet, our team of seasoned riders is ready to provide professional guidance for your specific bike.
Free Shipping Over 200€ (EU)
Shop your favorite gear without worrying about extra costs. We offer free shipping on all orders over 200€ (EU), ensuring your parts reach you safely and affordably.
Authorized Parts Europe Dealer
As a certified Parts Europe supplier, we guarantee 100% authentic, high-quality motorcycle parts and accessories directly from the world's leading manufacturers.

